MESON Chess Problem Database

Problem Display
PID: 211432 (8/3B4/b7/2B5/K7/3k1P2/8/2Q5 w - - 0 1)

Kashcheev, Niktopolion Pavlovich

Land og Folk, 1967

8/3B4/b7/2B5/K7/3k1P2/8/2Q5

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5+
      • 2.Bxb5#
    • 1...Bb7
      • 2.Bb5#
    • 1...Bc8
      • 2.Bb5#
  • Tries
    • 1.Be3?
      • 1...Bb5+
        • 2.Bxb5#
      • 1...Bc4
        • 2.Qd2#
      • 1...Bb7
        • 2.Bb5#
      • 1...Bc8
        • 2.Bb5#
      • 1...Ke2!
    • 1.Qd2+?
      • 1...Kc4
        • 2.Qd4#
      • 1...Kxd2!
    • 1.Qe3+?
      • 1...Kc4
        • 2.Be6#
        • 2.Qd4#
      • 1...Kc2!
    • 1.Qd1+?
      • 1...Kc4
        • 2.Qd4#
      • 1...Kc3!
  • Keys
    • 1.Qb2!
      • 1...Bb5+
        • 2.Bxb5#
      • 1...Kc4
        • 2.Qd4#
      • 1...Bc4
        • 2.Bf5#
      • 1...Bb7
        • 2.Bb5#
      • 1...Bc8
        • 2.Bb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(b);CHECK,N_GUARD::B(E),XB(b)
    • B(b);N_GUARD::B(E)
  • Tries
    • Try
      • B(D);
      • Vars
        • B(b);CHECK,N_GUARD::B(E),XB(b)
        • B(b);SBLOCK::QAR1(A)
        • B(b);N_GUARD::B(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • B(b);CHECK,N_GUARD::B(E),XB(b)
      • K(a);S_FLIGHT::QAR1(A)
      • B(b);SBLOCK::B(E)
      • B(b);N_GUARD::B(E)
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